National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Southern Illinois Airport (KMDH)

Lat: 37.78°NLon: 89.25°WElev: 400ft.

Fair

74°F

23°C

Humidity 85%
Wind Speed Calm
Barometer 30.00 in (1015.3 mb)
Dewpoint 69°F (21°C)
Visibility 10.00 mi
Last update 15 Jun 8:52 pm CDT
Extended Forecast for

Anna IL

  • Tonight

    Tonight: A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 69. Light and variable wind.

    Low: 69 °F

    Chance
    T-storms then
    Chance
    Showers

  • Monday

    Monday: A chance of showers and thunderstorms before 10am, then showers likely and possibly a thunderstorm between 10am and 4pm, then showers and thunderstorms likely after 4pm. Mostly cloudy, with a high near 80. Calm wind becoming southeast 5 to 7 mph in the afternoon. Chance of precipitation is 70%.

    High: 80 °F

    Showers
    Likely then
    T-storms
    Likely

  • Monday Night

    Monday Night: A chance of showers and thunderstorms before 1am, then a slight chance of showers. Mostly cloudy, with a low around 69. Light and variable wind. Chance of precipitation is 40%.

    Low: 69 °F

    Chance
    T-storms then
    Chance
    Showers

  • Tuesday

    Tuesday: Mostly cloudy, then gradually becoming sunny, with a high near 87. West southwest wind 3 to 7 mph.

    High: 87 °F

    Decreasing
    Clouds

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 73. South wind 6 to 8 mph.

    Low: 73 °F

    Partly Cloudy

  • Wednesday

    Wednesday: A 40 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 88. South southwest wind 10 to 15 mph, with gusts as high as 24 mph.

    High: 88 °F

    Partly Sunny
    then Chance
    T-storms

  • Wednesday Night

    Wednesday Night: Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 72. Southwest wind 7 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 70%.

    Low: 72 °F

    Showers
    Likely

  • Juneteenth

    Juneteenth: A slight chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 86. Northwest wind around 6 mph.

    High: 86 °F

    Partly Sunny
    then Slight
    Chance
    T-storms

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 67. Light and variable wind.

    Low: 67 °F

    Mostly Clear

Detailed Forecast

Tonight
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 69. Light and variable wind.
Monday
A chance of showers and thunderstorms before 10am, then showers likely and possibly a thunderstorm between 10am and 4pm, then showers and thunderstorms likely after 4pm. Mostly cloudy, with a high near 80. Calm wind becoming southeast 5 to 7 mph in the afternoon. Chance of precipitation is 70%.
Monday Night
A chance of showers and thunderstorms before 1am, then a slight chance of showers. Mostly cloudy, with a low around 69. Light and variable wind. Chance of precipitation is 40%.
Tuesday
Mostly cloudy, then gradually becoming sunny, with a high near 87. West southwest wind 3 to 7 mph.
Tuesday Night
Partly cloudy, with a low around 73. South wind 6 to 8 mph.
Wednesday
A 40 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 88. South southwest wind 10 to 15 mph, with gusts as high as 24 mph.
Wednesday Night
Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 72. Southwest wind 7 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 70%.
Juneteenth
A slight chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 86. Northwest wind around 6 mph.
Thursday Night
Mostly clear, with a low around 67. Light and variable wind.
Friday
Mostly sunny, with a high near 88. Calm wind becoming south around 6 mph in the afternoon.
Friday Night
Mostly clear, with a low around 72. South southeast wind around 6 mph.
Saturday
Sunny, with a high near 92. South southwest wind 6 to 10 mph, with gusts as high as 18 mph.
Saturday Night
Mostly clear, with a low around 75. South southwest wind 6 to 8 mph.
Sunday
Sunny, with a high near 92. South southwest wind 6 to 9 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Anna IL
 37.48°N 89.24°W
Last Update:
5:46 pm CDT Jun 15, 2025
Forecast Valid:
9pm CDT Jun 15, 2025-6pm CDT Jun 22, 2025
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation